Supercritical water fuel cleaning for improved combined cycle performance
New limits on greenhouse gases, dioxin and mercury emissions are forcing electric power producers worldwide to seek new technologies to prevent pollution. Conventional coal-fired steam power plants operate at less than 40% efficiency, while circulating fluid bed incinerators operate at less than 30%, and mass-burn incinerators produce power at less than 20% efficiency. These plants can produce 4 to 6 times as much carbon dioxide and other emissions as modem natural gas-fired combined cycle gas turbine systems. These systems operate at over 50% efficiency and can be installed in less than half the time and at less than half the capital costs of conventional coal-fired plants and incinerators. The US Energy Information Administration predicts that US coal used for electricity will increase 20% to 21 quadrillion Btu`s per year by 2015. In the developing world, coal used for electricity is expected to increase by 128% to 38 quadrillion Btu`s. Without significant improvements in fuel use, there will be a 68% increase in emissions by 2015. A revolutionary hydrothermal heat recovery steam generator (HRSG) is being developed by a federal, state university and industry partnership to produce clean fuels for gas turbines. The patented hydrothermal HRSG will accept solutions and emulsions without corrosion and deposition on heat transfer surfaces. An advanced continuous-flow pilot plant is being designed to test the HRSG over a wide range of operating conditions, including the supercritical conditions of water, above 221 bar (3205 psia) and 374 C (705 F).
- Research Organization:
- Coal and Slurry Technology Association, Washington, DC (United States)
- OSTI ID:
- 585444
- Report Number(s):
- CONF-980309-PROC.; TRN: 98:001614-0097
- Resource Relation:
- Conference: 23. international technical conference on coal utilization and fuel systems, Clearwater, FL (United States), 9-13 Mar 1998; Other Information: PBD: 1998; Related Information: Is Part Of The proceedings of the 23rd International Technical Conference on Coal Utilization and Fuel Systems; Sakkestad, B.A. [ed.]; PB: 1143 p.
- Country of Publication:
- United States
- Language:
- English
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